Resin composition and molded body formed from resin composition

Abstract

A resin composition which contains from 5% by mass to 65% by mass (inclusive) of a polymer (X) described below and from 35% by mass to 95% by mass (inclusive) of a polymer (Y) described below. Alternatively, a resin composition which contains more than 65% by mass but 85% by mass or less of a polymer (X) described below and 15% by mass or more but less than 35% by mass of a polymer (Y) described below, wherein a domain (y1) described below or a domain (y2) described below comprises a macromonomer unit. Polymer (X): a vinylidene fluoride resin Polymer (Y): a copolymer having a domain (y1) that is compatible with the polymer (X) and a domain (y2) that is incompatible with the polymer (X)

1 . A resin composition comprising 5% by mass or more and 65% by mass or less of a polymer X and 35% by mass or more and 95% by mass or less of a polymer Y, wherein:
 the polymer X is a vinylidene fluoride resin; and   the polymer Y is a copolymer having a domain (y1) which is compatible with the polymer X and a domain (y2) which is incompatible with the polymer X.   
     
     
         2 . The resin composition according to  claim 1 , having a melt mass flow rate measured at temperature of 220° C. and a load of 5 kg has a discrepancy of 4 g/10 minutes or more compared to a melt mass flow rate of a resin composition which consists of 100% by mass of the polymer Y. 
     
     
         3 . The resin composition according to  claim 1 , which exhibits a crystallization peak is observed when cooling is performed from 200° C. to 30° C. at a temperature lowering rate of 10° C./minute by using a differential scanning calorimeter. 
     
     
         4 . The resin composition according to  claim 1 , having a crystal fusion enthalpy measured by a differential scanning calorimeter of 10 J/g or more and 35 J/g or less. 
     
     
         5 . The resin composition according to  claim 1 , wherein the polymer Y is a copolymer comprising 1% by mass or more and 50% by mass or less of the domain (y1). 
     
     
         6 . The resin composition according to  claim 1 , wherein the domain (y1) or the domain (y2) comprises a macromonomer unit. 
     
     
         7 . The resin composition according to  claim 6 , wherein the macromonomer unit comprises a methyl methacrylate unit. 
     
     
         8 . A resin composition comprising more than 65% by mass but 85% by mass or less of a polymer X and 15% by mass or more but less than 35% by mass of a polymer Y, wherein:
 the polymer X is a vinylidene fluoride resin;   the polymer Y is a copolymer having a domain (y1) which is compatible with the polymer X and a domain (y2) which is incompatible with the polymer X; and   the domain (y1) or the domain (y2) comprises a macromonomer unit.   
     
     
         9 . The resin composition according to  claim 8 , which exhibits a crystallization peak is observed at 125° C. or higher when cooling is performed from 200° C. at a temperature lowering rate of 10° C./minute by using a differential scanning calorimeter. 
     
     
         10 . The resin composition according to  claim 8 , wherein the macromonomer unit comprises a methyl methacrylate unit. 
     
     
         11 . The resin composition according to  claim 1 , wherein the polymer Y is a block polymer having the domain (y1) and the domain (y2). 
     
     
         12 . The resin composition according to  claim 11 , wherein the domain (y1) consists of a methyl methacrylate unit. 
     
     
         13 . The resin composition according to  claim 11 , wherein a mass average molecular weight of the domain (y1) is 12000 or less. 
     
     
         14 . The resin composition according to  claim 11 , wherein the block polymer is an ABA triblock copolymer. 
     
     
         15 . A molded body obtained by molding the resin composition according to  claim 1 , wherein the molded body satisfies at least one of condition (i) or condition (ii): wherein
 the condition (i): a total light transmittance is 65% or more when a molded body is prepared to have a thickness of 3 mm; and   the condition (ii): a haze is 10% or less when a molded body is prepared to have a thickness of 400 μm.   
     
     
         16 . A molded body obtained by molding the resin composition according to  claim 8 .